You have a sample of 45 males, with an age range of 15-19, a mean height of 70.8 inches and a s of 1.5 inches. What is the standard error of the mean?
Group of answer choices
1.5
1.34
0.2236
0.0333
Flag question: Question 2
Question 21.25 pts
Okunrintemi, V. et al (2019). Trends and costs associated with suboptimal physical activity among US women with cardiovascular disease. Jama Network Open 2(4):e191977
These data are based upon a nationally representative survey spanning 10 years. Odds ratios were adjusted (a statistical term meaning to remove effects of different variables) but we still interpret them in the same way as you learned in the module.
For each variable (i.e. age, income strata, race/ethnicity, health insurance…) the first group has an odds ratio of 1. Why is that? Why is there a group with on odds ratio of 1 within each variable?
Group of answer choices
No answer text provided.
The other groups are being compared to this group. The first group of each variable is the reference group.
The first group has no risk of disease based upon the exposure.
The first group (i.e. 18-39 year olds, high income, non-Hispanic white…) has the lowest risk of disease.
Flag question: Question 3
Question 31.25 pts
Which of the following are assumptions of a one-sample test? (choose one or more)
Group of answer choices
normal distribution of data
ordinal or nominal scale of measurement
Interval or ratio scale of measurement
random sampling or selection
Flag question: Question 4
Question 41.25 pts
What is the Excel function for a one-sample z-test?
Group of answer choices
STANDARDIZE
ONE.SMPL
T.TEST
Z.TEST
Flag question: Question 5
Question 51.25 pts
A ________ is a statistic that measures the magnitude of the relationship between variables.
Group of answer choices
t-test
Measure of effect
p-value
Confounder
Flag question: Question 6
Question 61.25 pts
In the United States, mothers who live in poverty generally have babies with lower birthweight than women who do not live in poverty. The average birthweight for women living in poverty is 2800 grams, with a standard deviation of 500. Recently, a local hospital introduced an innovative prenatal care program to reduce the number of low birthweight babies born in the hospital. In the first year, 35 mothers, all of whom live in poverty, participated in this program. Program evaluators want to determine if the birthweight for infants of women who participated in the program is greater than the average birthweight for women who live in poverty. They choose an α of 0.05. The following data is the birthweight in grams for the babies born to the mothers who participated in this program.
3550
2700
2425
2900
3100
3300
3075
2850
3150
2550
3500
2600
2300
3450
3100
3275
2600
3200
3250
2450
3350
3350
2725
3200
2600
3250
3400
2975
3425
2975
3450
3250
3125
2750
2600
Use the provided information and data to run a one-sample z-test in Excel.
05-8 Data_homework7-1.xlsxDownload 05-8 Data_homework7-1.xlsx
How would you write the null hypothesis?
Group of answer choices
H0: xbar 2800
Flag question: Question 7
Question 71.25 pts
The average birthweight for babies in the United States is 3,325 grams with σ = 525. A researcher wishes to test whether or not a sample of 250 women in a rural community have a significantly different average birthweight than the national average at the α = 0.05 level. The mean birthweight for the sample of women in the rural community is 3400 grams.
What is the degrees of freedom for this study?
Group of answer choices
249
500
250
125
Flag question: Question 8
Question 81.25 pts
For which of the following scenarios would it be appropriate to use a one-sample z-test? (choose one or more)
Group of answer choices
Comparing the number of packs of cigarettes smoked per day by a sample of rural residents with the number of cigarettes smoked per day by all persons in the USA
Comparing the average weight of newborns in Hospital A to the average weight of newborns in Hospital B
Comparing political affiliation scores (ranging from 0-20) of ASU students against the political affiliation scores of all college students
Comparing the results of Likert scale patient satisfaction scores of patients at the Veterans Administration against the Likert scale patient satisfaction scores of the overall population of patients (non-VA patients)
Flag question: Question 9
Question 91.25 pts
The average birthweight for babies in the United States is 3,325 grams with σ = 525. A researcher wishes to test whether or not a sample of 250 women in a rural community have a significantly different average birthweight than the national average at the α = 0.05 level. The mean birthweight for the sample of women in the rural community is 3400 grams. After calculating the test statistic from the answer the following question:
True or False: this finding is statistically significant.
Group of answer choices
True
False
Flag question: Question 10
Question 101.25 pts
Okunrintemi, V. et al (2019). Trends and costs associated with suboptimal physical activity among US women with cardiovascular disease. Jama Network Open 2(4):e191977
These data are based upon a nationally representative survey spanning 10 years. Odds ratios were adjusted (a statistical term meaning to remove effects of different variables) but we still interpret them in the same way as you learned in the module.
Which of the following is the best interpretation of the odds ratio of 1.29 among low income strata women?
Group of answer choices
High income women with CVD have a 1.29 odds of engaging in suboptimal physical activity.
The odds of women with CVD engaging in suboptimal physical activity is 1.29 times greater in low income women as compared to high income women.
Low income women have a 129% greater chance of developing CVD.
There is no significant difference between high income women and low income women with CVD and their suboptimal physical activity.
Flag question: Question 11
Question 111.25 pts
In the United States, mothers who live in poverty generally have babies with lower birthweight than women who do not live in poverty. The average birthweight for women living in poverty is 2800 grams, with a standard deviation of 500. Recently, a local hospital introduced an innovative prenatal care program to reduce the number of low birthweight babies born in the hospital. In the first year, 35 mothers, all of whom live in poverty, participated in this program. Program evaluators want to determine if the birthweight for infants of women who participated in the program is greater than the average birthweight for women who live in poverty. They choose an α of 0.05. The following data is the birthweight in grams for the babies born to the mothers who participated in this program.
3550
2700
2425
2900
3100
3300
3075
2850
3150
2550
3500
2600
2300
3450
3100
3275
2600
3200
3250
2450
3350
3350
2725
3200
2600
3250
3400
2975
3425
2975
3450
3250
3125
2750
2600
Use the provided information and data to run a one-sample z-test in Excel.
05-8 Data_homework7-1.xlsxDownload 05-8 Data_homework7-1.xlsx
What is the p-value for the one-sample z-test?
Group of answer choices
0.0044
2.62
0.523
1.96
Flag question: Question 12
Question 121.25 pts
The purpose of the one-sample test is: (choose one or more)
Group of answer choices
To examine the difference between one sample and a population
Determine the probability that a sample and population are the same with respect to a particular variable
Compare a sample and population on a variable that is interval/ratio in measure
To compare a test statistic to alpha
Flag question: Question 13
Question 131.25 pts
In Excel functions, what does the output from the one-sample z-test represent?
Group of answer choices
The one-tailed probability value (p-value)
The significance level (alpha)
The obtained value
The critical value
Flag question: Question 14
Question 141.25 pts
Okunrintemi, V. et al (2019). Trends and costs associated with suboptimal physical activity among US women with cardiovascular disease. Jama Network Open 2(4):e191977
These data are based upon a nationally representative survey spanning 10 years. Odds ratios were adjusted (a statistical term meaning to remove effects of different variables) but we still interpret them in the same way as you learned in the module.
Which of the following odds ratios are significant at alpha = 0.05? (select all that apply)
Group of answer choices
1.33 among Hispanic women
0.83 among women living in the West
1.07 among women living in the South
0.92 among Asian women
1.22 among African American women
Flag question: Question 15
Question 151.25 pts
Okunrintemi, V. et al (2019). Trends and costs associated with suboptimal physical activity among US women with cardiovascular disease. Jama Network Open 2(4):e191977
These data are based upon a nationally representative survey spanning 10 years. Odds ratios were adjusted (a statistical term meaning to remove effects of different variables) but we still interpret them in the same way as you learned in the module.
What is the best interpretation of the odds ratio of 0.81 among participants with some college under the variable education level?
Group of answer choices
There is no significant difference between in suboptimal physical activity among women with CVD based upon education.
High school educated women with CVD have a 0.81 odds of engaging in suboptimal physical activity.
The odds of women with CVD engaging in suboptimal physical activity is 0.81 among women with some college as compared to women without high school education. There is a protective effect of having some college education.
There is a 81% chance of women developing CVD if they have some college.
Flag question: Question 16
Question 161.25 pts
How do we interpret Cohen’s D of .61?
Group of answer choices
small effect
large effect
medium effect
Flag question: Question 17
Question 171.25 pts
In the United States, mothers who live in poverty generally have babies with lower birthweight than women who do not live in poverty. The average birthweight for women living in poverty is 2800 grams, with a standard deviation of 500. Recently, a local hospital introduced an innovative prenatal care program to reduce the number of low birthweight babies born in the hospital. In the first year, 35 mothers, all of whom live in poverty, participated in this program. Program evaluators want to determine if the birthweight for infants of women who participated in the program is greater than the average birthweight for women who live in poverty. They choose an α of 0.05. The following data is the birthweight in grams for the babies born to the mothers who participated in this program.
3550
2700
2425
2900
3100
3300
3075
2850
3150
2550
3500
2600
2300
3450
3100
3275
2600
3200
3250
2450
3350
3350
2725
3200
2600
3250
3400
2975
3425
2975
3450
3250
3125
2750
2600
Use the provided information and data to run a one-sample z-test in Excel.
05-8 Data_homework7-1.xlsxDownload 05-8 Data_homework7-1.xlsx
Use the provided information and data to run a one-sample z-test in Excel.
Based on this information the researcher should make the decision to ___________.
Group of answer choices
change the null hypothesis
reject the null hypothesis
change the alternate hypothesis
fail to reject the null hypothesis
Flag question: Question 18
Question 181.25 pts
In the United States, mothers who live in poverty generally have babies with lower birthweight than women who do not live in poverty. The average birthweight for women living in poverty is 2800 grams, with a standard deviation of 500. Recently, a local hospital introduced an innovative prenatal care program to reduce the number of low birthweight babies born in the hospital. In the first year, 35 mothers, all of whom live in poverty, participated in this program. Program evaluators want to determine if the birthweight for infants of women who participated in the program is greater than the average birthweight for women who live in poverty. They choose an α of 0.05. The following data is the birthweight in grams for the babies born to the mothers who participated in this program.
3550
2700
2425
2900
3100
3300
3075
2850
3150
2550
3500
2600
2300
3450
3100
3275
2600
3200
3250
2450
3350
3350
2725
3200
2600
3250
3400
2975
3425
2975
3450
3250
3125
2750
2600
Use the provided information and data to run a one-sample z-test in Excel.
05-8 Data_homework7-1.xlsxDownload 05-8 Data_homework7-1.xlsx
Use the provided information and data to run a one-sample z-test in Excel.
True or False, this finding is statistically significant (at the = .05 level).
Group of answer choices
True
False
Flag question: Question 19
Question 191.25 pts
The average birthweight for babies in the United States is 3,325 grams with σ = 525. A researcher wishes to test whether or not a sample of 250 women in a rural community have a significantly different average birthweight than the national average at the α = 0.05 level. The mean birthweight for the sample of women in the rural community is 3400 grams.
What is the test statistic?
Group of answer choices
-1.35
-0.37
0.14
2.26
Flag question: Question 20
Question 201.25 pts
In the United States, mothers who live in poverty generally have babies with lower birthweight than women who do not live in poverty. The average birthweight for women living in poverty is 2800 grams, with a standard deviation of 500. Recently, a local hospital introduced an innovative prenatal care program to reduce the number of low birthweight babies born in the hospital. In the first year, 35 mothers, all of whom live in poverty, participated in this program. Program evaluators want to determine if the birthweight for infants of women who participated in the program is greater than the average birthweight for women who live in poverty. They choose an α of 0.05. The following data is the birthweight in grams for the babies born to the mothers who participated in this program.
3550
2700
2425
2900
3100
3300
3075
2850
3150
2550
3500
2600
2300
3450
3100
3275
2600
3200
3250
2450
3350
3350
2725
3200
2600
3250
3400
2975
3425
2975
3450
3250
3125
2750
2600
Use the provided information and data to run a one-sample z-test in Excel.
05-8 Data_homework7-1.xlsxDownload 05-8 Data_homework7-1.xlsx
Use the provided information and data to run a one-sample z-test in Excel.
How would you write the alternative hypothesis?
Group of answer choices
Ha: xbar 2800
Ha: xbar = 2800
